A ssignob to himself



UNITED STATES JOSEPH KINIZ, OF WEST MERIDEN, CONNECTICUT,

PATENT OFFICE.

MSSIGNOR TO HIMSELF AND PARTRIGK J. CLARK, OF SAME PLACE. I

PROCESS FOR. COATING METAL CASTINGS.

SPECIFICATION formingpart of Letters Patent No. 224,925, dated February24, 1880.

Application filed July 1, 1879.

To all whom it may concern:

Be it known that I,"JosEPH KIN'rz, of West Meriden, in the county of NewHaven and State of Connecticut, have invented a new and Improved Processfor Coating Metal Castings, of which the following is a specification.

My invention consists in an improved prooess for giving an ornamentalsurface or finish to iron castings, which process is as follows: Thecasting is first rolled 01' tumbled in the usual manner, and polished onthe portionsof the surface that are to have a polish on the finishedarticle, and then the casting is coated with copper or other metal byelectroplating.

It is next subjected to acid-bath, for cleaning, and then bolted torender the surface smooth and bright. It is then boiled in atin or othermetallic solution. The solution will deposit evenly over the entiresurface, and the polished 2o portions Will be left brilliant, therebyforming a fine contrast with the unpolished surface and giving a finefinish and effect.

The polishing previous to the electroplating, and the buffing subsequentthereto, are

essential stepsin the process, and by the boiling 2 5 'in a metallicsolution the desired color and a bright clean finish are obtainedWithout further labor.

The process is especially applicable to small castings in iron; but I donot limit myself in 39 special metallic soluthat respect, nor to anytion for giving the finishing color.

I am aware that butting, polishing, and plating are not new; but

What I do claim as new, and of my inven- 5 ture to brighten theornamental part, then 40 buffing the plain surface, and finally boilingit in a metallic solution to produce a lively color.

JOSEPH KINTZ.

Witnesses WILBUR F. DAVIS, GHARLEs W. MANN.

